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BP557 Equal horizontal length vs. not
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COMMENTS

All examples in this Problem are pairs of straight line segments.


This problem communicates the idea of projected distance, in this case from 2D to 1D (x-axis).

CROSSREFS

Adjacent-numbered pages:
BP552 BP553 BP554 BP555 BP556  *  BP558 BP559 BP560 BP561 BP562

KEYWORD

nice, precise, allsorted, stretch, perfect, unorderedpair, preciseworld

CONCEPT projection (info | search)

WORLD

two_segments [smaller | same | bigger]

AUTHOR

Leo Crabbe

BP900 Black shape is a valid shadow (2D projection) of 3D shape vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP895 BP896 BP897 BP898 BP899  *  BP901 BP902 BP903 BP904 BP905

KEYWORD

3d, orderedpair

CONCEPT 3d_solid (info | search),
projection (info | search)

AUTHOR

Leo Crabbe

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